Caves below sea level?

[Doug McCrae]

On a related note you might want to check out the Planet Earth episode that deals with Caves.

I've seen all the Planet Earths so far. That series absolutely owns. I mean it kicks ass all kinds of ways, I love it.

My favourite part was the polar bear vs walrus fight. Very sad when the polar bear just had to give up, lie down and die.

 

[Doug McCrae]

I'm not entirely sure the Cogs are below sea level Remember that Sharn's foundations sit upon a high cliff overlooking the Hilt.

That's a good point, though there are passages down to Khyber from the Cogs. One district is called Khyber's Gate.